L4 Ventilation perfusion matching and dead space

Play an AI-generated podcast conversation about this lesson

What is the formula for pulmonary ventilation?

Tidal volume / Respiratory rate

Tidal volume - Respiratory rate

Tidal volume + Respiratory rate

Tidal volume x Respiratory rate (correct)

Which of the following defines alveolar ventilation?

Minute ventilation minus pulmonary ventilation

Pulmonary ventilation minus minute ventilation

Minute respiratory volume divided by tidal volume

Pulmonary ventilation minus dead space volume (correct)

What effect does shallow rapid breathing have on alveolar ventilation?

Increases alveolar ventilation

Decreases alveolar ventilation (correct)

Converts alveolar ventilation to pulmonary ventilation

Has no effect on alveolar ventilation

How does an increase in dead space affect alveolar ventilation?

Decreases alveolar ventilation Signup and view all the answers

In which zone of pulmonary perfusion does blood flow occur only during systolic blood pressure?

Zone 2 Signup and view all the answers

Under what condition does blood flow occur in Zone 1 of pulmonary perfusion?

When alveolar pressure is less than pulmonary capillary pressure Signup and view all the answers

What is the average ventilation-perfusion ratio (VA/Q) in the base of the lung?

0.6 Signup and view all the answers

Which condition is associated with a high ventilation-perfusion ratio (VA/Q)?

Emphysema Signup and view all the answers

What happens to the ventilation as you move from the base to the apex of the lung?

Decreases Signup and view all the answers

In which part of the lung is there significantly more ventilation than perfusion?

Apex Signup and view all the answers

What is the main consequence of low ventilation-perfusion ratio (VA/Q)?

Decreased gas exchange Signup and view all the answers

Which condition results in less perfusion due to pulmonary thrombi or emboli?

Pulmonary thrombi Signup and view all the answers

What is the primary function of dead space?

To warm, moisten, and filter inspired air Signup and view all the answers

Which of the following statements about dead space is true?

Dead space is responsible for the difference between pulmonary ventilation and alveolar ventilation Signup and view all the answers

What is the relationship between anatomical dead space and physiological dead space?

Anatomical dead space and physiological dead space are equal under normal conditions Signup and view all the answers

What is the effect of sympathetic stimulation on the volume of dead space?

It increases the volume of dead space Signup and view all the answers

What is the definition of alveolar ventilation?

The volume of air reaching the alveoli per minute Signup and view all the answers

How is alveolar ventilation related to pulmonary ventilation?

Alveolar ventilation is less than pulmonary ventilation due to the presence of dead space Signup and view all the answers

L4 Ventilation perfusion matching and dead space

Choose a study mode

Podcast

Questions and Answers